Improvement in attaching knobs to door-latches



taken in connection with the accompanying ment.

WILLIAM E. ANDEEWs, CE NEW HAVEN, CONNECTICUT.

IMPROVEMENT IN ATTACHING KNOBS TO -DOORLATCHES.

Specification forming part of Letters Patent No. 63,980, dated April 23,1867.

To all 'whom it may concern:

Be it known that I, W. H. ANDREWS, of New Havenin the county of NewHaven and State of Connecticut, have invented anew Improveinent inKnob-Latches for Doors, Ste.; and I do hereby declare'the following,when drawings and the letters of reference marked thereon, to be a full,clear, and exact descriptionof the same, and Which said drawingsconstitute part of this specification, and rep- Figure 1, a perspectiveview of the spindle and knob, ,and in Fig. 2 a longitudinal centralsection, as attached to a door, the knob upon the left showing thecommon arrangement, and upon the right my improve- This inventionrelates to the manner of securing the knob and spindle together and tothe door; and consists, rst, in the introduction of a at plate beneaththe rose, upon which the neck of the knobbears, and relieves the rosefrom much of the strain usually brought thereon; also, in theconstruction of the rose in combination with the said plate, so that therose covers the screw or pin which secures the knob to the spindle.

As heretofore constructed, the seat of the neck of the knob hasbeenformed in a central recess in the rose, as seen at d, Fig. 2. Inattaching the parts together and to the door, the spindle is firstinserted, then the rose D over the spindle; then the knob is set intoits seat in the rose. This locates the rose in its position upon thedoor, and in such position the rose is secured; but as the spindlecannot be a perfect fit Within the follower' of the latch, there is,consequently, more or less play of the spindle, so that there is nocertainty that the rose is located in an exactly central position, andif not, the neck of the knob forms, as it were, a cam within the rose,and` by frequent turning soon loosens the rose from its fastening, and,the bearing ofthe spindle being Within the latch, the knob forms alever, which aids materially in detaching the rose from the door. Therst part of my invention overcomes these difficulties.

It is also a Well-known fact that the screw by which the knob is securedto the spindle soon loosens in its seat, and unless frequently returnedto its place is lost, and the knob slips from the spindle. The secondpart of my invention overcomes this difficulty.

In order to the better understanding of my invention, as well as toenable others to construct the same, I will proceed to a descriptionthereof, as illustrated ,in the accompanying drawings.

A plate, b, is formed fiat, as from a sheet of metal, and having acentral hole, the diameter of which is equal to the longest diameter ofthe spindle, so that the angles of the spindle have a bearing upon theedge of the hole, and the said plate is of smaller diameter than therose E, and so as to be covered by the rose, and thesaid plate issecured to the door independent of the rose, and thus forms a bearingfor the spindle.

The rose has an opening through its center sufficiently large to permitthe neck of the knob to extend completely through and rest upon theplate b, and also so that the rose may be slipped back to the knob., asseen in Fig. 1.

The plate b is secured to the door before .the knob B is placed upon thespindle, and.

is, therefore, adjusted and secured independent of the knob.

The rose E is slipped onto the neck of the knob, as seen in Fig. l, andthe knob then set upon the spindle, the hole for the screw a' beingformed nearer the end of the neck than in the ordinary construction, sothat when the knob has been secured to the spindle and the rose moved upagainst the door, the side c of the opening through the rose willcoverthe .head of the screw and prevent its removal. The rose is secured tothe door in the usual manner.

Thus it will be seen that a plate, b, upon both sides of the door,holding'rmly the spindle, prevents the usual Working of the spindle,which produces the loosening of the rose.

I do not broadly claim covering the screw in the neck of the spindle, asthis is not new; but,

Having thus fully described my invention,

what I do claim as new and useful, and ldeand the knob and spindle,arranged so as to sire to secure by Letters Patent, isinsert and coverthe screw or pin a, substan- 1. The combination of the plate b with thetially as and for the purpose set forth. spindle C and knob B,constructed and arranged in the manner and for thepurpose WM. H.ANDREWS. substantially as set forth. V l Witnesses:

2. The rose E, constructed in the manner CHAS. B. BRISTOL, described, incombination with the plate b R. FITZGERALD.

